body{
    *{
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    .wrapper{
        width: 1200px;
        margin: 0 auto;
    }
    ul li{
        list-style: none;
    }
    a{
        text-decoration: none;
        color: #333;
    }
    margin: 0;
    font-size: 14px;
    color: #333;
    line-height: 1.01;
    
    // 导航区域
    
}